What was found in Yorktown's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 650 µg/L 6.5% of the EPA limit 10000 µg/L Highest in the city: YESHIVA KEHILETH YAKOV · 150 people · 2019 | 1/3 | SYR4 |
| Nitrate-Nitrite | 634 µg/L 6.3% of the EPA limit 10000 µg/L Highest in the city: YESHIVA KEHILETH YAKOV · 150 people · 2019 | 1/3 | SYR4 |
| Fluoride | 207.5 µg/L 5.2% of the EPA limit 4000 µg/L Highest in the city: YESHIVA KEHILETH YAKOV · 150 people · 2017 | 1/3 | SYR4 |
| TTHM | 81.325 µg/L 102% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: YORKTOWN CONSOLD. WATER DIST.#1 · 36,000 people · 2019 | 3/3 | SYR4 |
| Chloroform | 61.25 µg/L No EPA limit set Main supplier: YORKTOWN CONSOLD. WATER DIST.#1 · 36,000 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 42.93 µg/L 72% of the EPA limit 60 µg/L Main supplier: YORKTOWN CONSOLD. WATER DIST.#1 · 36,000 people · 2019 | 3/3 | SYR4 |
| Barium | 37.25 µg/L 1.9% of the EPA limit 2000 µg/L Highest in the city: YESHIVA KEHILETH YAKOV · 150 people · 2017 | 1/3 | SYR4 |
| Trichloroacetic Acid | 23.92 µg/L No EPA limit set Main supplier: YORKTOWN CONSOLD. WATER DIST.#1 · 36,000 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 19.99 µg/L No EPA limit set Main supplier: YORKTOWN CONSOLD. WATER DIST.#1 · 36,000 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 18.32 µg/L No EPA limit set Main supplier: YORKTOWN CONSOLD. WATER DIST.#1 · 36,000 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 4.66 µg/L No EPA limit set Main supplier: YORKTOWN CONSOLD. WATER DIST.#1 · 36,000 people · 2019
Highest in the city: 6.425 µg/L — YESHIVA KEHILETH YAKOV · 150 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 5.04 pCi/L No EPA limit set Highest in the city: YESHIVA KEHILETH YAKOV · 150 people · 2018 | 1/3 | SYR4 |
| Dibromoacetic Acid | 2.64 µg/L No EPA limit set Main supplier: YORKTOWN CONSOLD. WATER DIST.#1 · 36,000 people · 2019
Highest in the city: 4.8 µg/L — YESHIVA KEHILETH YAKOV · 150 people · 2019 | 2/3 | SYR4 |
| Bromoform | 4.29 µg/L No EPA limit set Highest in the city: YESHIVA KEHILETH YAKOV · 150 people · 2019 | 1/3 | SYR4 |
| Monobromoacetic Acid | 4 µg/L No EPA limit set Main supplier: YORKTOWN CONSOLD. WATER DIST.#1 · 36,000 people · 2019 | 2/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.64 pCi/L 24% of the EPA limit 15 pCi/L Highest in the city: YESHIVA KEHILETH YAKOV · 150 people · 2018 | 1/3 | SYR4 |
| Monochloroacetic Acid | 3.18 µg/L No EPA limit set Main supplier: YORKTOWN CONSOLD. WATER DIST.#1 · 36,000 people · 2019 | 1/3 | SYR4 |
| Chromium | 2 µg/L 2% of the EPA limit 100 µg/L Highest in the city: YESHIVA KEHILETH YAKOV · 150 people · 2017 | 1/3 | SYR4 |
| Combined Uranium | 1.7655 µg/L 5.9% of the EPA limit 30 µg/L Highest in the city: YESHIVA KEHILETH YAKOV · 150 people · 2018 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.248 pCi/L 25% of the EPA limit 5 pCi/L Highest in the city: YESHIVA KEHILETH YAKOV · 150 people · 2018 | 1/3 | SYR4 |
| PFOA | 0.0069 µg/L No EPA limit set Main supplier: YORKTOWN CONSOLD. WATER DIST.#1 · 36,000 people · 2024 | 1/3 | UCMR-5 |
| Pfpea | 0.0033 µg/L No EPA limit set Main supplier: YORKTOWN CONSOLD. WATER DIST.#1 · 36,000 people · 2024 | 1/3 | UCMR-5 |
| Pfhxa | 0.0031 µg/L No EPA limit set Main supplier: YORKTOWN CONSOLD. WATER DIST.#1 · 36,000 people · 2024 | 1/3 | UCMR-5 |
| PFBS | 0.0030 µg/L No EPA limit set Main supplier: YORKTOWN CONSOLD. WATER DIST.#1 · 36,000 people · 2024 | 1/3 | UCMR-5 |
| Lead | 0.0012 mg/L 8% of the EPA limit 0.0150 mg/L Main supplier: YORKTOWN CONSOLD. WATER DIST.#1 · 36,000 people · 2025 | 3/3 | LCR |
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Yorktown
| Supplier | Population served |
|---|---|
| YORKTOWN CONSOLD. WATER DIST.#1 | 36,000 |
| KITCHAWAN WATER DISTRICT | 150 |
| YESHIVA KEHILETH YAKOV | 150 |
Frequently asked questions about Yorktown tap water
Is Yorktown tap water safe to drink?
EPA testing detected 25 contaminants in the water serving Yorktown. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Yorktown?
3 public water suppliers report drinking-water monitoring for Yorktown, New York to the EPA. Each is listed above with its population served.
What contaminants are in Yorktown's water?
The contaminants EPA monitoring detected in Yorktown include Nitrate, Nitrate-Nitrite, Fluoride, TTHM, Chloroform. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.